
package demo;
class B{
    public B() {
        func();
    }

    public void func(){
        System.out.println("B.func");
    }
}
class D extends B{
    private int num=1;
    @Override
    public void func(){
        System.out.println("B.func"+num);
    }
}
public class Test {
    public static void main(String[] args) {
        D d=new D();
    }
}

